Can someone please help, ty!!
(Will mark brainliest)

Answer:

[tex]t=4820 y[/tex]

Step-by-step explanation:

a) The half-life equation is given by:

[tex]t_{1/2}=\frac{ln(2)}{k}[/tex]

b) Using the decay equation we have:

[tex]Q(t)=15e^{-0.0001438t}[/tex]

we need to find t when [tex]Q(t)=\frac{Q_{0}}{2}[/tex]

[tex]7.5=15e^{-0.0001438t}[/tex]

[tex]0.5=e^{-0.0001438t}[/tex]

[tex]ln(0.5)=-0.0001438t[/tex]

[tex]t=\frac{ln(0.5)}{-0.0001438}[/tex]

[tex]t=4820 y[/tex]

Therefore, it will take 4820 years to decay to half the original amount.

I hope it helps you!

Answer:

2.275

Step-by-step explanation:

4.4-1.175= 2.275

Answer:

Twenty percent of $47.83 is equal to $14.66

If you did 20% of 47.83, that would equal 9.566. So, now you need to take the 5, which is equal to 500 cents, and turn it into 5 dollars. (One hundred cents is a dollar so 500 cents , is 5 dollars.) now it’s 9 + 5. Easy, it’s 14. Now add back the 66, and it’s 14.66 dollars. So the answer is...

14.66

Hope this helps =3

There's a way to think about it, in case you get other questions like this.

When you look at your problem, take out the 35. Out of the picture.

Look at 25%. 25% x 4 = 100% Meaning 4 is golden.

Then bring back the 35 and multiply it by 4. It gives you 140.

:)))) Use this mentallity on other question on percentages!

Answer:

24   +    28

2*2*2*3   +    2*2*7              [prime factors]

You may distribute any common ones, for example:

  4(6+7)              [that is, 2*2*(2*3 + 7)

  2(12+14)

Step-by-step explanation:

Step-by-step explanation:

52

Wow

Wow

Wow

Common sense

Answer:

use what is given

use CTCP

Answer: A box with an open top is to be constructed from a rectangular piece of cardboard with dimensions 18 in. by 30 in. by cutting out equal squares of side x at each corner and then folding up the sides as in the figure. Express the volume V of the box as a

Step-by-step explanation:

Answer:

Ryan should leave the house at 7:29

Answer:

[tex]5\frac{1}{4}[/tex]

Step-by-step explanation:

I hope this helps!

Answer:

5 [tex]\frac{1}{4}[/tex]

Step-by-step explanation:

Divide using long division. The whole number portion will be the number of times the denominator of the original fraction divides evenly into the numerator of the original fraction, and the fraction portion of the mixed number will be the remainder of the original fraction division over the denominator of the original fraction.

Answer:

109 x. A. Try your expression with a real number to see if it makes sense. For ... negative is a positive. C:X-3 ya tx combine like terms. 2x-3y². (De) 4x3y - 6xy3 ... B. (94-6) = (12-4x). Solve for x distribute on each side. if you use a calculator, put the ... distribute solve: 3(x+2). 3x +6. +57. 8 X+. 1 -6. = 5(-2-x). < -10 -5x. +5*. < -10.

Step-by-step explanation:

Answer:

The answer to 12x + 4x + 25y + 15y is 16x+40y for sure, I did it multiple times.

I don't see that answer in what you provided.

Step-by-step explanation:

Is there anything more that I can do to help you?

Answer:

Definitely B

Step-by-step explanation:

Answer:

It's D guys

Step-by-step explanation:

Answer:

Step-by-step explanation:

The two given angles add to 180 if the 2 angles that look parallel are parallel.

That means that

17x + 14 + 4x - 2 = 180        Combine like terms

21x + 12 = 180                     Subtract 12

21x = 180 - 12                      Combine

21x = 168                             Divide by 21

x = 168 / 21

x = 8

Therefore 17x + 14 is the angle you want.

<B = 17*8 + 14 = 150.

===================

There's another way to do this.

4x - 2 + <B = 180

4*8 -2 +<B = 180

32 -2 + <B = 180

30 + <B = 180

<B = 180 - 30

<B = 150

Answer:

5/12 / 7/8 =10/21

Step-by-step explanation:

Answer:

10/21

Step-by-step explanation:

5/12 divided by 7/8

5/12÷7/8

5/12×8/7

5×8/12×7

10/21

So the answer is 10/21

Answer:

0.1 or 10

Step-by-step explanation:

set it up and it’s easy 5 times 2 divided by 100

Answer:

5 is 2% of 250

Answer:

Step-by-step explanation:

[tex]4^{n} = 16 \\\\4^{n} = 4^2\\\\[/tex]

n = 2

2)

[tex]3^{n} =\frac{1}{81}\\\\ = \frac{1}{3^{4}}\\\\3^{n} = 3^{-4}[/tex]

n = -4

Answer:

y = -4/3x + 6

Step-by-step explanation:

1. 3y - 4x + 3y = 18 - 3y

2. 4x = -3y + 18

3. 18 - 4x = -3y + 18 - 18

4. -3/ -3y = 4x - 18 /3

5. y = -4/3x + 6

Answer:

y=7y=7y=7

Step-by-step explanation:

How to solve your question

Your question is

8+=63

8y+y=638y+y=638y+y=63

Solve

1

Combine like terms

8+=63

8y+y=63{\color{#c92786}{8y}}+{\color{#c92786}{y}}=638y+y=63

9=63

9y=63{\color{#c92786}{9y}}=639y=63

2

Divide both sides of the equation by the same term

3

Simplify

Solution

=7

y=7y=7y=7

Answer:

A paired t-test

Step-by-step explanation:

Number of items = 50

Variable in question = Price of each item

Classification of items = Similar or Same items

Locations from where items are drawn = 2 locations

The locations = Target Store & Walmart Store

Type of test to use = PAIRED TEST

This is because the items are same or similar and their comparison is the comparison of the mean values of two related groups. In this case, it is not immediately concluded that both groups have equal variance.

Answer: [tex]\dfrac19\text{ miles per minute}[/tex]

Step-by-step explanation:

Given: Length of one lap = [tex]\dfrac16[/tex] mile.

Jane ran 7 laps, Total distance covered = [tex]7\times\dfrac16=\dfrac76\text{ miles}[/tex]

Time taken =  10 minutes 30 seconds

[tex]=\text{ 10 minutes}+\dfrac{30}{60}\text{ minutes}\text{ [1 minute = 60 seconds]}\\\\=(10+\dfrac{1}{2})\text{ minutes}\\\\=\dfrac{21}{2}\text{ minutes}[/tex]

Jane's average speed = [tex]\dfrac{\text{Total distance covered}}{\text{ Time taken}}[/tex]

[tex]=\dfrac{\dfrac76}{\dfrac{21}{2}}\\\\=\dfrac{7}{6}\times\dfrac{2}{21}\\\\=\dfrac{1}{9}\text{ miles per minute}[/tex]

Hence, Jane’s average speed = [tex]\dfrac19\text{ miles per minute}[/tex]

Based on the number of laps that Jane ran and the time she ran it in, her average speed per minute must have been 0.11 miles per minute.

First convert the number of laps ran to miles:

= Number of laps x Conversion factor

= 7 x 1/6

= 7/6 miles

The number of minutes was:

= 10 minutes 30 seconds

= 10.5 minutes

The speed in miles per minute is:

= Number of miles / Number of minutes

= 7/6 ÷ 10.5

= 0.11 miles per minute

In conclusion, find out more at 0.11 miles per minute.

Find out more at https://brainly.com/question/20244484.

Answer:

x=34

Step-by-step explanation:

[tex]\frac{x}{2}=17\\x=2*17\\x=34[/tex]

Answer:

x=34

Step-by-step explanation:

Multiply 2 on both sides

x/2=17

x=34

Hope this helps :D

Please mark brainliest if correct

Answer:

I believe it should be b and d

Step-by-step explanation:

hoped it helped :)

Answer:

B

D

C

C

C

Step-by-step explanation:

There you go, have a good day

Answer:

49m/s

59.07 m/s

Step-by-step explanation:

Given that :

Distance (s) = 178 m

Acceleration due to gravity (a) = g(downward) = 9.8m/s²

Velocity (V) after 5 seconds ;

The initial velocity (u) = 0

Using the relation :

v = u + at

Where ; t = Time = 5 seconds ; a = 9.8m/s²

v = 0 + 9.8(5)

v = 0 + 49

V = 49 m/s

Hence, velocity after 5 seconds = 49m/s

b) How fast is the ball traveling when it hits the ground?

V² = u² + 2as

Where s = height = 178m

V² = 0 + 2(9.8)(178)

V² = 0 + 3488.8

V² = 3488.8

V = √3488.8

V = 59.07 m/s

Answer:

h=V/B

Step-by-step explanation:

Answer:

0.206897

Step-by-step explanation:

it is 0.206897 because you have take the whole make uneven fraction an add it to 60 in 60/72 to get 348 divided equals 0.206897

The decimal representation of expression 4(60/72) is approximately 4.8333...

We have,

To find the decimal representation of 4(60/72), we can perform the division and multiplication:

4(60/72)

This can be written as,

(72 x 4 + 60) / 72

Simplifying the fractions.

348/72

Divide the numerator by denominator.

4.83333

Thus,

The decimal representation of expression 4(60/72) is approximately 4.8333...

Learn more about expressions here:

https://brainly.com/question/3118662

#SPJ4

Answer:

OD. (-1, -3)

Step-by-step explanation:

in quadrant 3 the x-axis and y-axis is negative

hope this helps :3

if it did pls mark brainliest

Answer:

The answer is simple it is OD. (-1,-3)

Step-by-step explanation:

If you look quadrant III has -numbers so since quadrant III has -numbers then the answer has -numbers so both numbers have to be in the - and the only answer that has both numbers as - that means that it has to be OD. (-1,-3)!

Answer:

999

Step-by-step explanation: